Optical Measurements of Pressure and Shear on a Strut in Supersonic Flow (Postprint)
Abstract
To quickly vet candidate strut geometries, as well as build a database for computational validation, a series of struts was constructed and investigated with optical sensors for pressure, velocity, and skin friction. This paper reports the results of pressure and skin friction measurements on the strut surface using Pressure-Sensitive Paint (PSP) and Surface Stress Sensitive Films (S3F). PSP is an optical sensor that provides continuous distributions of pressure on a model surface. The paint on the surface is doped with a luminescent dye that is sensitive to the partial pressure of oxygen, and thus luminescent intensity is a function of pressure. S3F is a new skin friction sensor based on an elastic polymer film that deforms under the action of applied normal and tangential loads. Skin friction is determined by monitoring these deformations, and then solving an inverse problem using a finite element model of the elastic film.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 2009
- Accession Number
- ADA533011
Entities
People
- Campbell D. Carter
- Jim Crafton
- Kuang-yu Hsu
- Mark R. Gruber
- Sergey Fonov
Organizations
- Air Force Research Laboratory